96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
# Copyright (C) 2006-2007 Red Hat, Inc.
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# Copyright (C) 2007 One Laptop Per Child
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import logging
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import dbus
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_ACTIVITY_REGISTRY_SERVICE_NAME = 'org.laptop.ActivityRegistry'
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_ACTIVITY_REGISTRY_IFACE = 'org.laptop.ActivityRegistry'
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_ACTIVITY_REGISTRY_PATH = '/org/laptop/ActivityRegistry'
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def _activity_info_from_dict(info_dict):
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if not info_dict:
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return None
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return ActivityInfo(info_dict['name'], info_dict['icon'],
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info_dict['service_name'], info_dict['path'])
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class ActivityInfo(object):
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def __init__(self, name, icon, service_name, path):
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self.name = name
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self.icon = icon
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self.service_name = service_name
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self.path = path
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class ActivityRegistry(object):
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def __init__(self):
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bus = dbus.SessionBus()
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bus_object = bus.get_object(_ACTIVITY_REGISTRY_SERVICE_NAME,
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_ACTIVITY_REGISTRY_PATH)
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self._registry = dbus.Interface(bus_object, _ACTIVITY_REGISTRY_IFACE)
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self._registry.connect_to_signal('ActivityAdded', self._activity_added_cb)
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# Two caches fo saving some travel across dbus.
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self._service_name_to_activity_info = {}
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self._mime_type_to_activities = {}
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def _convert_info_list(self, info_list):
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result = []
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for info_dict in info_list:
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result.append(_activity_info_from_dict(info_dict))
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return result
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def get_activity(self, service_name):
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if self._service_name_to_activity_info.has_key(service_name):
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return self._service_name_to_activity_info[service_name]
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info_dict = self._registry.GetActivity(service_name)
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activity_info = _activity_info_from_dict(info_dict)
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self._service_name_to_activity_info[service_name] = activity_info
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return activity_info
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def find_activity(self, name):
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info_list = self._registry.FindActivity(name)
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return self._convert_info_list(info_list)
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def get_activities_for_type(self, mime_type):
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if self._mime_type_to_activities.has_key(mime_type):
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return self._mime_type_to_activities[mime_type]
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info_list = self._registry.GetActivitiesForType(mime_type)
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activities = self._convert_info_list(info_list)
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self._mime_type_to_activities[mime_type] = activities
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return activities
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def _activity_added_cb(self, bundle):
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logging.debug('ActivityRegistry._activity_added_cb: flushing caches')
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self._service_name_to_activity_info.clear()
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self._mime_type_to_activities.clear()
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_registry = None
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def get_registry():
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global _registry
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if not _registry:
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_registry = ActivityRegistry()
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return _registry
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